<!--www/default.html-->
function catalog(index){
for(var i=1;i<=4;i++){
document.getElementById("tcontent"+i.toString()).style.display = 'none';
document.getElementById("title"+i.toString()).className ='th2';
}
document.getElementById("tcontent"+index.toString()).style.display = 'block';
document.getElementById("title"+index.toString()).className ='th';
}